Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09f46dc340df3b9…

MALICIOUS

PDF

32.0 KB Created: 2020-08-17 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e0ab3345791b788a92c426f0fb1e19 SHA-1: 16b11b6767f26ce5cde3e59cc1c68f7b2b43085a SHA-256: f09f46dc340df3b9afafe5da87e07736d2c49b5fa6bc53f304d92c05a8c7022a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body, though heavily obfuscated, contains references to the same malicious URL and numerous other PDF links hosted on Shopify and other domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bhojpuri+film+video++2019
    • http://files.giniasgems.com/uploads/1/3/0/7/130775707/jenezin.pdf
    • http://files.texasfinesse.com/uploads/1/3/0/7/130739528/koguvijose.pdf
    • http://files.bethelcrcyouth.com/uploads/1/3/0/8/130813777/nozejagajalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/fegikinapivebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/wetasanifikepebir.pdf
    • https://cdn.shopify.com/s/files/1/0436/8157/9161/files/kenmore_heavy_duty_70_series_washer.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/filodomizubokomoviju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/bazojizikobotatiximume.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/python_convolution_2d.pdf
    • https://cdn.shopify.com/s/files/1/0438/4643/4976/files/download_streaming_video_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/les_amygdales_anatomie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004121.bin
36f8636eabb58a31c3c3b75bc5a49925b794e940e7c0777080583763cafc6ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4121 5560 bytes
font_01_sfnt_off00005405.bin
60fb52b577554e22555fb9906cdef3828b3ef2f214018f3f979154df1a8448e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5405 9244 bytes

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